Electron Transport Chain

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Overview of the Electron Transport Chain
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7 сен 2024

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Комментарии : 1 тыс.

@andreagallegosdei 5 лет назад

imagine taking a semester class with this guy as your biology professor. Would actually be worth paying tuition.

@ChiragSonne Год назад

Yeah I know @Andrea Gallegos

@malevolentmaiko 14 лет назад

THIS. NOW THIS is how a lecture should be taught. I'm so sick and tired of all my professors reading dully off of powerpoint slides. No explanation, no excitement, and it isn't even put in the lecturer's own words, making it harder to convey the full message. You have taught me ALL of the key points for aerobic catabolism when it took me 4-1 hour lectures and 3 hours of my own time reading through the book and sorting through all of the overwhelming information.

@annjoseph1907 10 лет назад

newer concept states: 1 NADH provides 2.5 ATP 1 FADH2 provides 1.5 ATP therefore by the end of cellular respiration 32 ATPs are formed

@peanutbutter369 10 лет назад

how .5? i have never seen that anywhere else?

@rahrahritaa 10 лет назад

Muhammad Usama 10 H+ are transported out of the matrix per 2e- passed from NADH to O2 through the ETC, and 4H+ are transported into the matrix per ATP then the mitochondrial P/O ratio is 10/4 or 2.5. For succinate, it's 6/4 or 1.5. The P/O ratio is the number of ATP molecules formed in the ETC per electron pair. (From my textbook, Biochemistry by Garrett & Grisham)

@calskankz2267 5 лет назад

Yes sometimes 32 sometimes 30 ATP.

@prabhasingh5064 5 лет назад

@@calskankz2267 yeah depending upon the shuttle system operated.

@calskankz2267 5 лет назад

@@prabhasingh5064 Can I ask you a question please? English is my foreign language. In what cases is the word "upon" used in sentences?

@ml14163 8 лет назад

Thank you!! I love these videos; they help so much! Khan academy is more useful than my $300 textbook

@pedroparamo4938 6 лет назад

You are talking about Devlin's biochemistry, am I right? Thia book is so detailed you can't even comprehend what topic you are studying.

@MrValkyr1e 6 лет назад

You do realize this is elementary level?

@5327arod 6 лет назад

YoU dO rEaLiZe ThIs Is ElEmEnTaRy LeVel?

@MrValkyr1e 6 лет назад

@@5327arod you got a problem ?

@caramellover7653 5 лет назад

Futile Mortals it’s not elementary level tho it’s APbio

@khanacademy 14 лет назад

I agree. That's a classy "first". I am proud that Khan Academy viewers are this sophisticated :)

@thetruthandthetruthonlypod4868 6 лет назад

Khan Academy may we please get an app for khan academy please???

@noblevenom2858 9 месяцев назад

its just so surreal seeing comments from so long ago...13 years ago seems like a life time ago

@Jessica-if4zv 10 лет назад

I don't normally comment, but holy shit Khan Academy thank you so much.

@gennabrunet6354 5 лет назад

agreed

@gbeepee9995 5 лет назад

I remember watching this in AP biology in high school and now I'm taking biochemistry during my last summer of my biological sciences degree. Thanks Khan! You've been with me the whole time.

@andrewfayi9448 3 года назад

This takes "The mitochondria is the powerhouse of the cell" to a whole new level.

@themadladprince430 2 года назад

All those memes gave us an introduction

@jakigotowiga2030 10 лет назад

.Are there any plans underway to award Khan Academy a Nobel Prize or something.??just curious.

@tashreeqa_ek 6 лет назад

I'll sign that petition 🙋🙌

@ghosttownbmw 5 лет назад

Google gave them hundreds of thousands of dollars to help out the program. I think that’s close enough lol

@wildhunter9295 4 года назад

Well considering that Obummer got it for pretty much nothing, yes I think Khan should get it since he actually did something.

@liamvalois-reilly7478 3 года назад

I like the enthusiasm, but no unfortunately

@matts.6904 10 лет назад

How in the world are you supposed to comprehend this in one sitting? It's like there is a component within a component within a component within a component within a component. And each one of those components has multiple pieces in of themselves. I lose context very quickly with each step being explained. You are very blessed with a good mind if you can understand all this in one sitting.

@matts.6904 10 лет назад

Jakigoto Wiga Everyone learns differently, and it's just really difficult for some people to understand the first time. Don't get me wrong, this video covers everything you need to know, but some may have to watch/analyze it more than once to understand it all.

@matts.6904 10 лет назад

Jakigoto Wiga Yes I agree! Okay, I was being a little serious; now I chuckle at your first comment (;

@Jackthecoolguy 9 лет назад

Well the purpose of this video is not to have you completely understand this by just watching the video. Most people learn this stuff in school first then watch these types of videos to solidify their understanding and make sure they know everything for a test.

@chrisharnish6824 9 лет назад

This is complicated! Its why we teach it in college ex phys and biochem, and then again and again in grad school. If you're expecting to get it in the first run is unrealistic and doesn't reflect the difficulty of the topic.

@gn.punpun 7 лет назад

its not that hard really... you should see the nervous system or immunity hahaha

@hotsummer4567 8 лет назад

im taking a biology test next week. thanks khan academy. i sometimes regret i should rather have paid attention to professor than cram for an exam but i never put it into action :)

@td6063 9 лет назад

Sal: i'm not gonna go into detail on this. *goes in detail* And the amazing thing, I understood it all

@LakotasMommy2011 9 лет назад

I am in an introductory Microbiology class and I cannot explain to you how much all of these videos have helped me. I DEEPLY appreciate you taking the time for this because I feel prepared for my test now when I thought all hope was lost. THANK YOU SO MUCH!

@BeeHappisee 8 лет назад

Nice video, slight correction: protons are pumped into the intermembrane space, they are not pumped into the outer membrane.

@dorianmyrtai6007 8 лет назад

protons are pumped into the intermembrane space...but he named it outer space so the point is the same

@SjefeNoverSjef 8 лет назад

Yo, i dont understand where the protons come from? I know they are pumped from the matrix to the intermembrane space. But where did the protons in the matrix come from.

@shemuelpatton3853 7 лет назад

+sjefenoversjef NADH is oxidized via the complexes(1,3, and 4) which releases the H from the electron carrier. So: NADH--> NAD+ and H+ are the products from oxidation.

@SjefeNoverSjef 7 лет назад

Bob Marley Hmm..yes. I see! ty

@SjefeNoverSjef 7 лет назад

Bob Marley So basically, every H+ that is pumped across the membrane comes from the oxidation of NADH?

@FamineNH 5 лет назад

Thank you so much for these videos bro. I had my midterm this week over cellular respiration, photosynthesis, and cellular membranes. I read all the chapters in my textbook, but they were so complex I was having a hard time grasping it. Ended up watching your videos on each of these subjects all night before my exam and I got a 98! Almost half of the class failed the midterm and only 2 other people got As. You seriously explain things so well in a way that is very easy to grasp and remember. Thanks a ton

@Godwin_100 Год назад

Me going through all these now and seeing your testimony just blow my mind🤯

@gracehamilton2874 9 лет назад

Khan Academy is truly a life saver. This year when I embarked on my journey through AP biology I was really nervous because it's my first year of high school. However, by watching his videos and reading in my textbook I feel confident in my understanding of complex concepts and I have really come to love biology. Each day I'm one step closer to becoming a doctor ! Also, I'd just like to point out that khan academy isn't meant to give you the run down of an entire chapter in one 17 min video. It is essential that you read, listen in class, work on schoolwork at home, and then review. Ps: to the person who asked what the difference between chemiosmosis and the ETC is, chemiosmosis is the process of the atp synthase working within the electron transport chain. These two combined are known as oxidative phosphorylation. :))))

@gracehamilton2874 9 лет назад

MoodiFLEX Im a ninth grader in Massachusetts. But the reason I'm learning it now is because I'm taking a college biology class (AP Bio )

@mzwanelenkunzi5345 9 лет назад

grace Hamilton i actually knew this thing in my first year varsity

@gracehamilton2874 9 лет назад

whats first year varsity? Mzwanele Nkunzi

@mzwanelenkunzi5345 9 лет назад

grace Hamilton I mean i knew it in my first year at university

@gracehamilton2874 9 лет назад

MoodiFLEX thanks and thats really interesting i have always wondered how schools in different countries teach curriculum because here in america i think the general view is that you guys all go to private schools but maybe thats just how it is portrayed in movies and thats why i think that. are the majority of schools there private or public?

@NicholasPorter 10 лет назад

"Oil Rig" O.I.L. R.I.G Oxidation is Losing, Reduction is Gaining. Took me a minute to figure out, as I have not watched whatever video that was explained in, Super glad I know now, really nice.

@aisharazi463 3 года назад

how can i understand 17 mins video over 1 our lecture at college? KHAN ACADEMY YOU ARE MY SAVIOUR. My soul flew out of my body when you said the protons wants to go back in haha

@juicydior5 8 лет назад

Khan Academy saves my life every time it has to do with math or biology! This amazing video for ETC clarified many things for me. Basically a one on one session with a much knowledgeable person! Great job.

@indraalagar6461 9 лет назад

Before this video the ETC seemed so complicated- now after watching it I actually understand how it works! Khan's concise explanations really cleared up those 6 or so pages in my AP Bio textbook. Thanks Khan Academy for making biology so enjoyable and easy to understand!!

@Y3ahokay 13 лет назад

This man is amazing! He has got to be one of the most innovative educators of our time! And just think of how many people he has taught in how many different subjects all over the world!!! Colleges and universities charge thousands to learn what he is giving for free... Someone give this man a Nobel Prize!!!

@yourfuturedocburenbeiya 3 года назад

I love Khan Academy!! I wish the MCAT content doesn't get removed...I learn so much more from you all! :(

@yeroshima 10 лет назад

Amazing work. Finally i understand what the hell they are talking about in class. you should get a medal for that !

@voodoo2GPC 11 лет назад

You know, sometimes I feel like my bio teacher has no idea what he's doing. I just began watching these and I have already learned more than I have all quarter. Thank you very much and please keep producing these. I will definitely be coming back to them in the future.

@spencerleefe8475 10 лет назад

I love it when he says "this is...THE CUTTING EDGE"

@ibleedhuskerred3 11 лет назад

you sir, will save my ass in my biology class. Im a freshman in college and am taking general biology at the University of Nebraska. My professor isn't the best and his wording and notes are confusing as hell. You on the other hand, should be given an award. thanks man, much appreciated.

@JandCanO 9 лет назад

I'm a sophomore in high school, and this really helped me solidify my understanding of this system for my AP Bio class! I'm going to have my teacher look at this! Thanks!

@Tanvee 9 лет назад

JandCandO Even I'm a sophmore and even I'm watching this video for my AP bio class. Actually, we have our bio final tomorrow so i'm just reviewing :)

@duai7090 5 лет назад

I'm beyond thankful that you added Arabic subtitles. I was thinking to drop the class but after I found your channel, hell nah I’m gonna take the class and I’ll try my best to take A+.

@VMMCSASDARJUNG 8 лет назад

2e- + 2H+ + 1/2 O2 ----> H2O is the correct reaction..but you have wrongly shown it as 2e- + H+ + 1/2 O2 ---> H2O

@ashleymarin3928 8 лет назад

+PRABAKARAN S omg that was driving me crazy as well.. ok yeah it's 2 H+s

@seraphinakay 8 лет назад

+PRABAKARAN S He does say 2 H+, just wrote it incorrectly

@amandaservosakadutcher7775 8 лет назад

in his next video of oxidative phosphorylation he corrects himself lol

@Anikung17 8 лет назад

This was driving me nuts. I had paused the video and was looking online for why 2e- + H+ gives you 2H. Thank you!

@danytoumajean2300 7 лет назад

2 from glycolysis 2 from the oxidation of pyruvate and 6 from the Krebs cycle

@Shiusen 2 года назад

It's amazing of all the details we don't know yet. Human body is the most elegant machine ever built.

@scler8453 9 лет назад

Sad times when you've used Khan academy since you were 14 for GCSE's, and now you can't because now you're doing a degree… :'(

@Zen_Zen_Zense 3 года назад

It's worse not knowing about him until starting y13 A-levels....

@mscrawford87 13 лет назад

Seriously this was the MOST fantastic description of glycolysis/krebs cycle/election transport chain/chemiosmotic coupling (the axel he described) that I have EVER heard! Your explanations were very clear, you did not include the additional details that were not required (these reactions that were skipped are relatively simple, but have a tendency to clutter all of these processes) to understand the process! Keep up the excellent work!

@thescolex 9 лет назад

idk about progress with researching ATP synthase but imagine how funny this will be when people actually find out how it works. i imagine grandchildren like: "they thought we had.. mechanically structured... motors? what were they on...''

@BlueAsYourEyes 11 лет назад

Ahhhh why are these videos so long! So much to learn in biology! But still learn stuff a million times quicker watching these than my teacher! Thanks so much!

@stellapld 9 лет назад

Khan Academy, you da real mvp.

@mikael5079 5 лет назад

You just saved my final :( listening to you for the first 5 minutes answered all of my confusion. Thank you so so much

@s95175364 7 лет назад

Very clear, and easy to understand! Thank you so much!! ***The formula of reduction, should be "2 H+"?

@farahsameer2100 7 лет назад

Jane Kuo Yes i guess

@lucaspreafico7298 2 года назад

Asked myself same thing

@fcoroa 12 лет назад

Not only do you explain the basic concept of the ETC, you also help undestand a process that everyone refused to explain. I didn't understand how NADH and FADH2 could magically turn themselves into ATP just by letting it's electrons go through a transport chain! Thank you, kind sir!

@makavelisreturn 8 лет назад

great video! it helped me as review material for my National Board Dental Exam !

@emmaserrano6958 3 года назад

wow, this video came out when i was 7 years old and here i am in my first year of medical school watching it. crazy

@BxBxProductions 9 лет назад

This is proof that life itself is of intelligent design. Aerobic respiration by itself is so complicated it doesn't seem to be a chance event.

@michaelsteinberg3272 6 лет назад

A Bio Class is probably not the best place for Religious people to debate religion...

@Ruisleipae01 12 лет назад

I love the fact that people just sitt down and explain stuff like this to people they dont even know for free!:)

@julia-rosesatre4392 9 лет назад

I was under the assumption NADH = 2.5 ATP not 3....and FADH2 = 1.5 ATP not 2

@Dagreton 9 лет назад

Julia-Rose Satre Yup! You are right.

@thescolex 9 лет назад

+Julia-Rose Satre this vid is almost 6 years old

@emeraldcalmgrace98 9 лет назад

it depends on which book you are using since every books has its own atps measurements.

@nealbhalodia6835 9 лет назад

+Julia-Rose Satre it's not exact. It's more like a range. 2-3 and 1-2. He just averaged it out.

@makeway3080 9 лет назад

nah cuz dat tings called aeteapee make like 38 of them shits yall know wat im sayin? like best case scinerio 38 shits, but normally like 29 of em shits is created yall know?

@paperthink92 14 лет назад

I live in fear of the day you quit making these videos and I have to go back to learning all by myself. You have such a gift for teaching!

@lukehill6899 9 лет назад

I love Miranda Sings.

@armpitpuncher 14 лет назад

That's the most sophisticated "first" I've ever seen. Bravo.

@nguyentranbao839 8 лет назад

at 5:29 just turn on the automatic English subtitles and you will see the magic :)

@moon5darkness 8 лет назад

LOL so childish but it's funny

@janeazarova5527 6 лет назад

I wanna merry the guy who just explained this so easy. Thank you! This channel is the best for every student.

@Rickandmorty_com 10 лет назад

wow.. evolution... the more i study biology, the harder it is for me to believe it.

@mattm2004 10 лет назад

You realize at this point, evolution is basically proven fact in the scientific community, right?

@Rickandmorty_com 10 лет назад

***** ?? yeah? what's your point? unfortunately it's a theory still.

@mattm2004 10 лет назад

shinviroz "A scientific theory summarizes a hypothesis or group of hypotheses that have been supported with repeated testing." This mean that "unfortunately", a theory is proven fact unless there is solid evidence to dispute it. The only real "evidence" to dispute evolution is religious examples which are not considered valid.

@Rickandmorty_com 10 лет назад

***** Yes I learned it as a theory back in highschool more than 10 years ago. I don't know how they teach it now.

@nmelianene1946 9 лет назад

***** cool, that's true. Are there any "real evidences" that disprove God?

@nmatosarroyo 10 лет назад

why can't you be my professor?

@Nailegh101 12 лет назад

THANK YOU so much I saw your three lessons on Glycolysis, Kreb cycle, and Electron Transport chain and I completely understood everything. I am currently taking microbiology and when my professor was explaining it everything was confusing. Now with these videos I understand how ATP synthesis works. Thank You once again and keep doing videos because it is really helpful.

@stephaniegracec1 9 лет назад

this is the most confusing thing ive ever watched

@trishitabarua7181 4 года назад

Your channel is literary THE BEST for every neuroscience topic. thank you so very much for these.

@kristinelkeller 13 лет назад

The net production of 38 ATP is correct for prokaryotes, but for eukaryotic cells, it is 36. Two NADH that were produced during glycolysis cannot cross the inner mitochondrial membrane and are therefore reduced. These molecules transfer electrons to an intermediate carrier molecule which delivers electrons to the second carrier molecule Q that you mentioned. This should mean that two NADH reduced from glycolysis produce 2 ATP yielding a total (with Kreb's and ETC) of 36 ATP.

@arhaney1988 14 лет назад

I just wanted to point out that it is actually 36 ATP formed at the end of the ETC. This is because the 2 NADH formed from glycolysis only produce 2 ATP in the ETC instead of the usual 3 ATP (on average). They are formed in the cytoplasm instead of the matrix so the electrons it puts forth toward to production of ATP are at a lower energy level, like FADH2, since they have go a further distance. This is just what my professor explained to me. Your videos are awesome by the way!!

@a262982850 12 лет назад

You help not only somebody who use Eng as mother language You help International students!!!!

@irinesiraj 10 лет назад

SAL u rock! i'm studying for usmle step 1 and everytime i get stuck on the basic biochem stuffs I come back to your videos. keep up the great work!

@khandakersabitbinrazzak9043 9 лет назад

apu eita amar kaje dibe... thank u

@melwintube 12 лет назад

Awesome lecture. i just wished you would go more into detail on each of the complex's, heme's, cytochrome. but thanks a lot.. it gave me a good idea and for the other mechanism i was able to easily connect. thanks Dr. Khan

@stevenjones5800 9 лет назад

Great video. Very well explained. One thing that is bugging me is that ATP synthase does NOT use the energy from the proton gradient to directly make ATP. ADP and Pi readily form ATP once bound to the surface of the enzyme. The problem is that once they are bound and turned into ATP, it takes energy to get them off. THIS is what the gradient's energy is used for - popping the formed ATP off of the enzyme and allowing for another set of ADP and Pi to bind.

@gemmalove-wyatt6960 11 лет назад

I have a biology exam on Tuesday and cell respiration was the only thing I was worried about. This video has saved my life. Absolutely brilliant. Thank you!

@dakotalee4329 6 лет назад

To be 10 years old this video helped me tremendously. For anyone interested look up some atomic force microscopy images of the ATP Synthase. 💚 Science!

@cassidygage6477 7 лет назад

oh my gosh I have a test over cellular respiration tomorrow and I just wasn't getting it but I watched a few of your vids THANK YOU SO MUCH

@Ace220X 12 лет назад

I'm in BioChem I, so I need a deeper level than this, but my professor couldn't even get the basics across in a clear manner. Thanks a lot.

@agnieszkaponichtera9667 6 лет назад

Two years of struggling with cellular respiration... Finally I got it ! Thank you so much !!

@thelostworld 14 лет назад

omg your description is much much clearer than my lecturer's. couldn't thank you enough! thumbs up!

@theswankster161 11 лет назад

His OIL and RIG acronyms are great, I was also taught "L.E.O the lion goes G.E.R: which is Loss of Electrons = Oxidation, and Gain of Electrons = Reduction. Just another example that might help someone.

@kakankrakau 7 лет назад

Very good! A new fact is that each NADH gives 2,5 ATP, and each FAD2 1,5 ATP. This is the reason some books teach that one glukos gives 38 ATP, och and some say it only gives 30-32. The books stating 38 ATP are using old data and are wrong.

@purplealienmonster 14 лет назад

thank You!!!!!! i'm in class for three hours and don't understand anything. i watch this and it makes perfect sense.

@gennabrunet6354 5 лет назад

finally im starting to grasp this ETC stuff! Thank you! I like his genuine excitement about it, it helps.

@NerdFrancaisSuperb 13 лет назад

I can hardly express my gratitude as I wish to thank you for creating these extremely informative videos. You've actually made biology a favourite subject of mine.

@RAWRitsRoyal 13 лет назад

All of your videos are incredible. As a sophomore in highschool, I UNDERSTAND what you're saying because you explain it thoroughly. It's much easier to have you explain what's going on than to rely on the textbook alone. Thank you for making these videos!

@AdamZUTube 13 лет назад

It's not even that you explain it better than my teachers (though you do explain it beautifully), it's the fact that I can pause and rewind you over and over whilst enjoying a glass of wine in the evening that makes you the best teacher ever!!! Thank you!

@fatin161 13 лет назад

if only my lecturers are able to speak and explain as good as you. awesome vid. thanks!

@willo5537 3 года назад

I know this was released year ago, but if your still around and getting notifications, can you tell me, where do the 2x ATP’s come from initially to start the process?. Do you have a video on this and do you have a video on how it works if you are a carnivore that doesn’t eat carbs(glucose)

@KFAintheUSA 14 лет назад

This Khan Academy is revolutionary.. ¡Viva Free Information!

@Fotbalfan64 12 лет назад

Khan academy is better than any amount of lecture ive ever had. it makes learning this so much more simple!

@StephenLee1 11 лет назад

you need to balance the equation you started at 3:09 by adding a 2 next to the H+. It should read 2e- + 2H+ + 1/2 O2 -------> H20 a simple annotation would do the trick. Thanks for everything, Sal :)

@PizzamuraProject 6 лет назад

Thanks Khan Academy the Internet is now my library.

@jimmyhart5155 3 года назад

Watched this video in my first semester of college for Bio 1, watching it again now in my last semester for biochemistry 2. Wow, glad I’ve made it such a long ways 😂

@alexgalal5990 11 лет назад

wow this is more than i needed, knowing all those unecessary details for my exam helped me so much more and i was able to link things together . thanks a lot, you uploaded those 4 years ago and i am still using them now.

@sanjanasriv 5 лет назад

My teacher explained this to us by lining up and labeling kids as stuff, and then having them yeet beads at a wall which served as the OC as they received Twix bar electrons. Love my teacher.

@ayeesharon 6 лет назад

Here to study for the first medical Microbiology exam of the semester. Thank you for explaining these concepts a lot better than my professor!

@zackback7 13 лет назад

Also, I forgot to mention that I am learning this stuff in a Biology I course in Virginia. I am in HIGH SCHOOL. They are teaching us the most complicated things nowadays!

@pauline2703 14 лет назад

i liked it. it went into a bit too much details and chemistry with electron energy levels but it actually helped me to understand biology more from chemical point of view. tthanks!!

@olkaeem 8 лет назад

i just wanted to say that everyting is much easier with your videos, great job

@AYMY09 7 лет назад

sir you are graduated in every sub???? you xplained chm absoultely amaazziiinnggg n now bot i can say that ur voice is most audible......

@michellelin1947 9 лет назад

I'm really happy that I fully understand the electron transport chain, it helped me to visualize the whole process in my head while watching this video!

@1n0cturnal 12 лет назад

I guess thats what separates great scientists from people who work another job with scientific knowledge; the latter is only interested in the information that they will "use" for their job and such. They dont see the "point" in learning about cellular respiration. The former, however, sees it as a quest to uncover the fascinating process of Nature, which is without doubt the most complex and fascinating thing we know. Some are driven by this curiosity, others not so much.

@heathercatley211 11 лет назад

Very informative. Very helpful. Finally cellular respiration makes sense. Thank You!

@adambrandonbondoc 12 лет назад

Make more please? U represent all the visual learners like myself who have a hard time understsnding professors ramble on without any kind of aids and expect us to absorb information like a sponge.. a like and a subsription for u sir!!!

@ward2jm 11 лет назад

my prof pointed this out as well. the integers are older rounded estimates whereas the more precise numbers are just that, more precise. i think in a previous video he mentioned that 38 ATP was an estimate and the cell would have to be very efficient to get all 38. not sure how deep your biochem needs to go, but for me i just chalked it up as something i needed to be aware of but not know exactly how. hope this helped and good luck.

@TheMaksoof 13 лет назад

Thank you sooooo much. You did not only make me understand it but you have a gift to make it stick in my memory!

@jaimeiam 14 лет назад

amazing that you managed to make it so clear... I've looked at tens of pictures of Cellular respiration, and couldn't get it... the 4 videos are time very well spent (Cellular Respiration Intro, Glycolysis, Krebs Cycle, ETC). THANK YOU!

@SuperSbowers 13 лет назад

I understand it now! Wow! Teacher like no other ... Bless you!

@zxsdwe170 6 лет назад

jzka Allah khayrn ur work is more valuable than any text book 15 min here better than 2hrs in text book (:

@zackback7 13 лет назад

This is the first time I have watched any of your videos, but assure me, I will definitely do so again. You have explained this like my teacher and textbook could never accomplish, Thanks for making this so clear to me, for it is a very complicated thing. I will be thanking you when I get a good grade on my Cellular Respiration test tomorrow. Thanks!!!